ON THE CHANGE OF VELOCITY FIELD IN NEARSHORE ZONE DUE TO COASTAL DRAIN AND THE CONSEQUENT BEACH TRANSFORMATION

Michio Sato, Tadahiro Fukushima, Ryuichiro Nishi, Masahiko Fukunaga

Abstract

It is essential to understand the details of the mechanisms by which a coastal drain works in order to build up the method which enables us to estimate discharge requirement for effective operation in field conditions. Some measurements on the changes of quantities which may be relevant to the function of coastal drain are discussed. Then, an attempt to implicate the current components produced by drainage in a numerical model of beach profile evolution is discussed.